it's not the first time i've heard of a Surefire not working right, but to be clear, it's only the second time. a few years ago, a buddy of mine bought the E2 Defender. his daughter knocked it off the desk it had been sitting on, and the lens shattered. needless to say, he was not pleased. he returned it, and they replaced it. no problems since then.
Is that your example of a Surefire not working, or do you have another you are referring to? A shattered lens due to a drop off a desk isn't what I'd call "not working".
Like Citizen, I have had many problems with Surefires. I have six of them, from a single 123 powered incandescent, a couple G2Z's which I loved till both stopped working, and a few others. Only one of the six works. The G2Z's both burnt modules prematurely, one after three days when I dropped it, the other after ten or so hours use and then the switch on both went bad after replacing both modules to the tune of 40 dollars each! I'll never buy another Sure FIre product and I was a die hard fan till all the problems happened. I am going to send both the G2Z's back and see how good their customer service is.
I am very sorry to hear of all your problems. I own 9 Surefires, and only 1 has ever acted in a way that it shouldn't have, and that was their newer G2X Pro model (and it was a small issue that the average consumer wouldn't have even noticed). I received a properly-working replacement from Surefire.
My suggestion about Surefire repairs - if you don't get anywhere with their repair department, a little whining to their customer service department seems to be a more direct way of getting things done quickly and correctly.
I guess Surefire is one of those brands that gets either praised or knocked, due to their high price, their military/law enforcement connections, and their reputation for durability. I've had issues with almost all of the many different brands of flashlights I own, but if I had to trust just 1 of them - it would be a Surefire.
Another thing I like about (older) Surefire models is your ability to play "lego" with them. They are endlessly upgradeable and customizable. You can easily find a $50 Surefire 6P body (with no LED or lamp assembly), and spend $200-300 on parts, pieces, cerakoting, drop-ins, etc. They are the AR-15 of the flashlight world.
But like with guns and knives - the best flashlight in the world is the one you have with you. If that's a $15 Streamlight Microstream - it's the best flashlight in the entire world when the lights go out!